Someone at work is selling a 340 watt 2 channel amp. I'm trying to figure out if this would be powerful enough to handly my 2 subs which push 150 watts each. Reading the back of the amp it says it could handle 60x2 @ 4 Ohm or 170 x 1 (bridged) @ 4 OHM. Anyone have any idea if it's good enough?